Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 401, Issue -, Pages 81-89Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2012.03.026
Keywords
Model; Permeate flux; Fouling resistance; Cross-flow; MEUF
Categories
Funding
- National Natural Science Foundation of China [50608028, 51178172, 50978088, 51008121, 51039001]
- Ministry of Education of China [NCET-08-180, NCET-08-0181]
- Xiangjiang Water Environmental Pollution Control Project Subjected to the National Key Science and Technology Project for Water Environmental Pollution Control [2009ZX0 7212-001-02, 2009ZX0 7212-001-06]
- Hunan Key Scientific Research Project [2009FJ1010]
- Hunan Provincial Natural Science Foundation of China [10JJ7005]
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Cross-flow micellar-enhanced ultrafiltration had been used to separate pollutants from waste water effectively, while permeate flux decline with time because of the increase of fouling resistance. According to resistances in series theory, total transport resistance is the sum of two parts: membrane hydrodynamic resistance and fouling resistance. By observing material balance and hydrodynamic type of filtration, we proposed an analysis method of fouling resistance that was based on cross-flow filtration and took into account the presence of micelles instead of traditional cake resistance theory that was built from dead-end filtration. We found permeate flux decline not only by the relationship of time t(1/2) that traditional cake resistance theory said, but also by concentration of fouling layer phi (or phi). Retentate non-recycled and retentate recycled cross-flow experiments were carried out under different operate conditions (i.e., transmembrane pressure (TMP) and initial concentration) by using artificial cadmium (Cd) contaminated water and sodium dodecyl sulfate (SDS) and models showed excellent accuracy to predict permeate flux through correlation r(2) from 0.935 to 0.990. (C) 2012 Elsevier B.V. All rights reserved.
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